Cloud color function set up

OpenRA.Mods.Sp/Traits/Palettes/GradientColorsPalette.cs

@@ -0,0 +1,64 @@
+#region Copyright & License Information
+/*
+ * Copyright (c) The OpenRA Developers and Contributors
+ * This file is part of OpenRA, which is free software. It is made
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version. For more
+ * information, see COPYING.
+ */
+#endregion
+
+using System.Linq;
+using OpenRA.Graphics;
+using OpenRA.Primitives;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.SP.Traits
+{
+	[TraitLocation(SystemActors.World | SystemActors.EditorWorld)]
+	[Desc("Add this to the World actor definition.")]
+	public class GradientColorsPaletteInfo : TraitInfo
+	{
+		[PaletteDefinition]
+		[Desc("The name of the resulting palette")]
+		public readonly string Name = "resources";
+
+		[FieldLoader.Require]
+		[Desc("Start color for gradient")]
+		public readonly Color StartColor;
+
+		[FieldLoader.Require]
+		[Desc("End color for gradient.")]
+		public readonly Color EndColor;
+
+		[Desc("Index set to be fully transparent/invisible.")]
+		public readonly int TransparentIndex = 0;
+
+		[Desc("Allow palette modifiers to change the palette.")]
+		public readonly bool AllowModifiers = true;
+
+		public override object Create(ActorInitializer init) { return new GradientColorsPalette(this); }
+	}
+
+	public class GradientColorsPalette : ILoadsPalettes
+	{
+		readonly GradientColorsPaletteInfo info;
+
+		public GradientColorsPalette(GradientColorsPaletteInfo info)
+		{
+			this.info = info;
+		}
+
+		public void LoadPalettes(WorldRenderer wr)
+		{
+			var da = (info.EndColor.A - info.StartColor.A) / 254f;
+			var dr = (info.EndColor.R - info.StartColor.R) / 254f;
+			var dg = (info.EndColor.G - info.StartColor.G) / 254f;
+			var db = (info.EndColor.B - info.StartColor.B) / 254f;
+			var d = 0;
+			wr.AddPalette(info.Name, new ImmutablePalette(Enumerable.Range(0, Palette.Size).
+				Select(i => (i == info.TransparentIndex) ? 0 : Color.FromArgb(info.StartColor.A + (int)(++d * da), info.StartColor.R + (int)(d * dr), info.StartColor.G + (int)(d * dg), info.StartColor.B + (int)(d * db)).ToArgb())), info.AllowModifiers);
+		}
+	}
+}

mods/sp/rules/environment/world.yaml

@@ -599,7 +599,7 @@ World:
 		Image: smoothclouds
 		## duplicatd the idle0, idle17 to save a trait
 		Sequences: idle1, idle2, idle3, idle4, idle5, idle6, idle7, idle8, idle9, idle10, idle11, idle12, idle13, idle14, idle15, idle16, idle18, idle0, idle17, idle0, idle17, idle0, idle17, idle0, idle17, idle0, idle17, idle0, idle17, idle0, idle17, idle0, idle17
-		Palette: jascgrey
+		Palette: cloud
 		Speed: 6
 		SpawnInterval: 1000
 		CruiseAltitude: 3c0

mods/sp/rules/palettes/palettesterrain.yaml

@@ -113,3 +113,20 @@
 		AllowModifiers: true
 		ShadowIndex: 1
 		#RBGSwapMode: None #None #GRB #BGR #RBG #BRG #GBR
+
+	## Change color of clouds
+	GradientColorsPalette@cloud:
+		Name: cloud
+		AllowModifiers: false
+		# Jascgrey
+		StartColor: 010101
+		EndColor: FFFFFF
+
+		# snow normal green cloud (best)
+		#StartColor: 000100
+		#EndColor: F1FFF1
+
+		# temp normal green cloud (not good)
+		#StartColor: 000F00
+		#EndColor: E0FFE0
+